Photographic-film-drying apparatus



May 29, 1923. 1,456,902

' s. T. MlcHELsEN PHOTOGRAPHIC FILM DRYING APPARATUS Filed Aug. 26. 1921 vzo /0 Patented May 29, 1923.

.UN IT En Asi AT iEeS:

v STEPHENT. MIcHELsEN, or'wiisHiNe'roN, `DISTRICT or coLIiMBIA.; l f .ff

-f l vprioroGfiaariiio-r1Litinniziive APPARATUS.

ApplicationiledlAugustfv261921. Serial No. i.tiSG''i." i i A I l Y I TQ all @uhmml if may concern; 1,. Be it known that I, STEPHEN T. MICHEL si-LN, a citizen of the United States, residing,

at lllashington, Districtof Columbia, have invented. certain new and usefullmprovements in Photographic-FilinDrying Ap paratus, of'which the following is a specii` cation.

My said invention relates to driers and more particularly to an apparatus for drying photographic films which are, coated withA an emulsion on bothl sides. Those skilled in the art are, well aware that both, surfaces of the films must beprotected while wet as any scratchesjin either sidev will mar the negative. The piesentsystern of drying photographic films consists V of securing clip to one end of the wet films. and ythen hanging them up to drain andzdry by means of i evaporation, which usually, requires from v four to eight hoursand which` subjects `.the

soft emulsions to the danger of being marred or scratched by coming in contact with other ilms. In this method, the air in .the room must be kept comparativelyfree Afrom circulation so that the ilms will lremain stationary.-

In they apparatus to be hereinafter, de-,

scribed, theiilms are each securedy atboth vends and spacedfrom each ,other softhat duringthe dryingprocess it isimpossible for them to get `into contact with each other. Instead of allowing the films to dry slowly in still air, the portion of the apparatus,y to which they are attached is revolved at high speed which causes each film to ,discharge its surplus water by centrifugal force and at the same time creates sufhcient draft 0r circulation of air to effect a complete drying of the Elms in 20 or 30 minutes. It is theiefore one object of my invention to greatly shorten the duration of time required to completely dry photographic films. vAnother object is to protect the surfaces of the films during the drying operation. Other objects andadvantages will become apparent from the following specification and the appended claims, reference being had to the accompanying drawing forming a part thereof in which similary characters of reference designate like parts in the several views of which:

Figure l is side elevation of my improved drying apparatus.

locking means therefor.

1X4 o f Fig. 3, and H Y of one of the.clampingbars:show inglthe l 4 In the drawings, l0 represents aiubase or i 'l support of suitable form havingruprights y`11` i' adjacent its ends in which a Shaft 12 .is ournailed to rotate.: 'A1 disk 13 fis ysecuredon each end of the'shaft by means, offlat spokes 1 4 setat an angle to form fans,and these,y

disksl are rigidly connected to each other' b y't master clamping barsl 15 '-and"',individual" clamping bars 16, 17 and l8`as willfbe Vfully described later.y Flat' strips ,lifconnect 'o'p-` posing spokes 1 4 of the two disks 13f'toj Iact asa fan. The disks-13; and the various'- clamping bars, virtually form anopencyl -inder adapted to be rotated at -hi'ghfspeed by.

anysuitable means. Ijhave shownfo'rf-the purpose a motor 19 having apulley20E di-iv-V ',r l,

a ,belt 21 whichruns in a grooveforined in .the periphery of. oneof'the disks13. It

tion is to be goyerned by the size of the cyl, A

inder, but Ihavefound that acylinder'lthree feet in diameter rsliould'revolve atiaspeed o'f' `300 revolutions `per 4minute vfor pfbest,

about results. The clamping iiigbars and others as yindividua,l., clamping barsfor the vreason that onefendi'ef'each film, regardless of its l e ngth ',"i s,rstsecured--,v I to a masterv clamping' bar 15 while they "1.,

opposite endsof-the films, which arey of different standard lengths, are secured to the individual clamping bar 16,' 17 or l18 films accordingto their lengths ,isobviated identical in construction, butv I yhave i"efferred to some of themas ffmastefrclaiiipx of headed tacks 23 spaced about inch y apart.

coming out. y similar strip25 having aseries of openings 26 bored in its under side to register with the ltacks 23. In operation, thestrip 25 is raised as shown by the dotted lines in Fig.V

5 and oneend of the films F are pushed down on the tacks 23 with the tacksperfoi'. "il l A' facing strip 24is secured beneath the strip 22 to prevent the tacks 23 from- Hinged to the strip 22 is 'a so 'i is kto be understood that the speed ofrota-Q Vdown againstV the iilins Witli the" points' oif' the tacks 23 entering the openings 26; Each of the clampingI barsV carries' a-scriesl of,

locking elements comprising a plate 27 of rectangular form Whiclil restsin' a depression 28 inthe strip 25 and has an upturned end 29 forming a iing'er piece?v The opposite end of the plate is Islotted as at 30 and ada'pte'd'whii' iiilocked position' to s lide beneath, the head4 3l of a` boltV held seciiiielyin'the strips: 22' and 21E .by nutis' 33. The plate is held iii'ifs lockedi positionv by nansofa Soren/35E slecured'riirtlic strip 2li passingytlirough aslot' 'i'ntlic plate andprov'id'ed'vvith a vfingd'nuti 36 that is readily loosened toprinit the'dpl'ateto slide far' enough' to bring' its slotted end from beneath" the heacl n or the boit p casing coi'jsisting'loiia frame' 37 over vvhich isstr'etchecl clothy 385 may be' used to coverthe entire" apparatus tok ekcl'ude any di'i'sti or foi'eigir mattervvhicli would tend to mar the s r I WishV it understood that altllioutglr'I4 have shown threesetsof 'c'lai'iiping hairs, I do not vv'ish to beA limited' to any particular nun'iber of sets jorl to any particular number of individual cl'amping'fbitrs to each set.'

f What I cl'aiin 'as nevv7 and vdesire to securel byLetters Patentis': l e

l.; Aj ce'yv'triifuggal drying apparatus vfor plviotographic ilmscornposedin part of an "der carrying 'master means for secuiing o ne Aend of eaclrnofth'eiilins of different lengths andindividual means for sev curiigthe `other ends thereof, and nreans 'for rotating 'said'cylinfde'r att" a' high speed to cause "the said ilmspto bow out of co'ntact with certaink of the said individual rmejans, substantially asset fortli.

2E photograph-ic iilin drier comprising abase," uprigli'ts secured to` said base,-a rshaft journalled in said uprights, an open cylinder secured to said shaft and comprising a pair of op'eirv disks, axial'bars connecting said disks, iilm grippingmeans formed in said bars, air agitating means connecting said disksand means for rotatingsaid disks and bars bodily, substantially as set forth. 3. A- photographiclfilm drier comprising supports, a rotatable cylinder carried by said supports, a serieso independent groups of lilm gripping bars forming a part of said cylinder and air ag'i't'ating means carried Within said cylinder, substantially as""'set forth. c

1-, A rotary photographic filmI drying ap?" paratu's comprising a`- series` of ii'idepen'dentf groupsof film grippingbarsg each group` comprising a master gripping.;V bai' and a series of individual gripping bars, substan' tially as set forth.

` 5. InA a photographic film drying' appara?T tus film' gripping barsi com-pri'singl ay centr-alstrip," a row of tacks in sai-dV central strips-lg# ataclr retain-ing bar Secure'd tof the nin-'der side ot' said cei'itralZ strip-,L a* cover' strip hinged to one' edge of said central strip;l perforat'i'ons in* the under side of 'said cover? strip'registering with said tacks' `and meansE for lock-ing sai-d cover strip `tosaid cei'itraxl` strip, substantially asf setV forth.

6.- Al centrifugal dryingJ apparatus forV photograph-ic films composed-in partof yan open cylinder carrying master inleans4 for" securing one end of each of the films ot' different lengths and individual' means forn securing thev other ends' thereof,l ifne'ans'llor` l rotating said cylinder -a't a" hifg'lispen-i'dE4 to cause the said films to bow out of ContactV with certain of the saidindividualmeans, means for drawing' air into' the ends of said cylinder and further n'ie'anslfor forcing saidl air out ofthe side' of saidcylinderpastthe said films,- substantially as-set forth.

Iny testimonywherf I a'iixf my signa` ture:

STEPHEN: T.i MicHELsEN. 

